Rail-grinder.



E. P. 'TABOR.

RAILGRINDER.

APPLICATION FILED APR. 5. 191/.

Lfiwflfib, Patented Mar. 26,1918.

2 SHEETS-SHEET l- 6 5" Y Y 3636 4 /4 j E. P. TABOR. RAIL GRINDER.

APPLICATION FILED APR. 5. 19H.

LWATM. PatentedMar. 26, 1918.

'2 SHEETS-SHEET 2.

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' and claimed,

TTETT %TATE@ PATENT EDWARD P. TABOR, F WORCESTER, MASSACHUSETTS,ASSIGNOE 0F CINE-FOURTH TO HEBRICK S. HURLBUT, 0F WORCESTER,MASSACHUSETTS.

RAIL-GRINDER.

Specification of Letters Patent.

Patented Mar. 26, 11218..

Application filed April 5, 1917. Serial No. 160,055.

To all whom it may concern: 7

Be it known that I, EDWARD P. TABOR, a citizen of the United States,residing at Worcester, in the county of lVorcester and State ofMassachusetts, have invented a new and useful Rail-Grinder, of which thefollowing is a specification.

The device forming the subject matter of this application is adapted tobe employed for grinding rails, frogparts, mates, joints, crossovers,switch elements and the like.

One object is to provide novel means whereby the direction of travel ofa carriage which supports the grinding wheel, may be reversed.

Another object of the invention is to provide novel. means whereby thegrinding wheel will be lifted at the time that a reversal of thecarriage is brought about.

Another object of the invention is to provide novel means for somounting the grinding wheel that the same will have an extended range ofadjustment with respect to the work.

The invention aims to provide novel means for driving the carriage andto provide novel means for rotating the grinding wheel.

It is within the province of the disclosure to improve generally and toenhance the utility of devices of that type to which the presentinvention appertains.

With the above and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed it being understood that changes in the precise embodiment ofthe invention herein disclosed can bev made within the scope of what isclaimed, without departing from the spirit of the invention.

In the accompanying drawings Figure 1 shows in top plan, a grindingmachine constructed in accordance with the present invention;

Fig. 2 is a vertical longitudinal section taken through the mechanismwhich Supports the grinding wheel;

Fig. 3 is an elevation showing the mechanism which supports the grindingwheel;

Fig. 4 is a perspective view delineating one of the parts whereby thegrinding wheel is supported;

Fig. 6 is a perspective view showing one of the slide bearings whichcoacts with the part shown in Fig. 4E; and

Fig. 7 is a section approximately on the line 77 of Fig. 1.

In the accompanying drawings, the numeral 1 indicates a track, alongwhich is adapted to reciprocate, a truck denoted gem erally by thenumeral 2. The truck 2 may be variously constructed, but in the presentinstance it is shown as comprising side beams 3 and i, an intermediatecross beam 5 connecting the side beams 3 and l, a longitudinal beam 6connected with the cross beam 5, cross beams 7 and 8 extended be tweenthe beam 6 and the beam 4: on oppo site sides of the beam 5, arms 9 and10 proecting from the beam 8 and connected adjacent their outer ends bya supporting rod 11, an arm 12 projecting from the beam 7, a beam 21connecting the arm 12 with the beam 6, and a beam 32 connecting theparts 5 and 7. The particular frame-work above described may, however,be changed without jeopardizing the utility of the invention.

Bearings 14 are mounted on the parts 3, 6 and 4;, and in these bearingsis journaled a driven axle 15 carrying wheels 16 traversing the track 1.Mounted on the parts 3, 6, 12 and a are bearings 17 in which isjournaled an idle axle 18 carrying wheels 19 traversing the track 1. Amotor 20 is supported on the beams 7 and 21 and may be of any desiredconstruction, an electric motor being delineated in the presentinstance. The shaft of the motor 20 appears at 22 and is journaled in abearing 23 on the beam 6 adjacent the beam 21. The shaft 22 carries aworm 2i coacting with a worm. wheel 25 on a shaft 26 arranged at rightangles to the shaft 22, the shaft 26 being journaled in bearings 27mounted on the beams 5 and 7. The shaft 26 is provided with a worm 28meshing into a worm wheel 29 on a shaft 30 disposed parallel to theshaft 22 of the motor 20 and journaled in bearings 31 mounted on thebeam 6 and on the beam 32. By means of intermeshing beveled pinions 3-3,the shaft 30 is operatively connected with a shaft 53% disposedapproximately parallel to the shaft 26 and journal ed in bearings on thebeams 5 and 8. A. beveled pinion 36 is secured to the shaft 34 andcooperates with a reversing mechanism carried by the axle 15, and now tobe described.

A sleeve 89 is splined at -10 to the axle 15 for longitudinal slidingmovement thereon, and carries beveled pinions 37 and 38, adapted tocooperate one at a time with the beveled pinion 36 on the shaft 3 1. Thenumeral d1 indicates a frame supported at its outer end for slidingmovement on the rod 11 which connects the arms 9 and 10. At its outerside and at its extremities, the frame 11 is supplied with projections12 and 13. The frame 411 has collars n slidably mounted on the axle 15,so that the frame may move longitudinally of the axle 15. The collars ncooperate with the ends of the sleeve 39 which carries the beveledpinions 37 and 88. Dogs 15 and 16 are pivoted at 19 to the outer ends ofthe arms 9 and 10 respectively, the dog 15 having an inwardly projectingfinger 47, and the dog 46 having an inwardly projecting finger 18,

the finger 418 being adapted to coact with a projection 52 on a collar51 slidable on the axle 15, the collar 51 constituting a part of anangular arm 50, a part of which extends approximately parallel to theaxle 15. A. compression spring 53 surrounds the axle 15 and isinterposed between the collar 41 of the frame 11 and the collar 51 ofthe arm 50. There are nuts 5% on the arm 50, holding adjustably on thearm, a bar disposed at right angles to the axle 15 and including acollar 57 slidable on the axle 15, the col lar 57 having a projection 58which coacts with the finger -17 of the dog -15. The inner end of thebar is slidably supported on a wear plate 56 connected with the beam 8.A compression spring 59 surrounds the axle 15 and is interposed betweenone of the collars 1 1 of the frame 41 and the collar 57 0f the bar 55.

A rod 60 is disposed approximately parallel to the axle 15 and isconnected adjust ably, by means of nuts 61, with the bar 55. Nuts 62 areemployed for connecting the rod 60 adj ustably with a. traveler 63, withwhich a threaded part 64 of the axle 15 cotiperates. The numeral 65marks a rod disposed approximately parallel to the rod 60 and connectedadjustably, by means of nuts 66, with the traveler- 68. The rod 65terminates at one end in a vertically elongated eye 67. A

.collar 68 is mounted on the axle 15 and includes oppositely extendedprojections 69 and 70-arranged approximately parallel to the axle 15.The collar 68 is frictionally held on the axle 15, and the constructionis such, that, although the collar 68 will rotate with the axle 15against the action of a restraining force of considerable magnitude, arotation of the axle 15, independently of the collar 68 withal is notimpossible, when the collar 68 is positively held against rotation,

in a manner which will be set forth herein after.

The numeral 71 denotes a lever passing through the eye 67 of the rod theconstruction being such that, although the lever 71 may have a verticalmovement in the eye, the eye will constitute a means for swinging thelever 71 horizontally. The numeral 72 has beenused to designate a secondlever, disposed at an acute angle to the lever 71. The numeral 7 3denotes a lever which is fulcrumed, intermediate its ends, to swingvertically on a bracket 7% carried by the beam 3. The inner ends of thelevers 72, 71 and 7 3 are pivotally connected, as shown at 75, in such away that the levers 72 and 71 cannot swing vertically, independently ofthe lever 73, it being possible, nevertheless, to swing the levers 71and 72, for adjustment, in a horizontal plane, on the pivot connection 75, to vary the angle between the levers 71 and 72. The vertical swingingmovement of the compound lever comprising the parts 73, 72 and 71, islimited by a stop 76 which may be mounted on the beam In order to adjustthe anglebetween the levers 72 and 71, a bolt 77 is passed therethrough,and carries nuts 78, cooperating with the members 71 and 72. The lever 73 is provided with an extension 79. V

The extension 79 of the lever 78 engages beneath a collar 80 secured toa screw shaft 81 provided at its upper end with. a hand wheel 82, thescrew shaft 81 being adapted to swing, in a direction indicated by thearrows in Fig. 2, in a slot 83 formed in a plate 8% attached to anunderlying base plate 85 provided with an opening-'86 which is of largersize than the slot 88 in the plate '81. The base plate 85 is pivoted asindicated at 87 to the beam 3, so that the base plate may be swung in ahorizontal plane for adjustment, and in order to hold the base plate inadjusted positions, clamp screws 89 are in serted through arcuace slots88 in the base plate, theclamp screws engaging the beam 3. A. collar 90is attached to the screw shaft 81 below the base plate 85, and acoinpres sion spring 91 surrounds the screw shaft, the lower end of thespring 91 engaging the collar 90, and the upper end of the spring pass 7ing through the opening 86 in the base plate 85 and bearing against theplate 84:, on opposite sides of the slot 88 thereln. The screw shaft 81is threaded into a nut 92 having trunnioiis 93 received in openings 98formed 7 in vertically reciprocating slide bearings 9%, received inundercut guides 97 formed in vertical hangers 95 having projectingends96 which are secured to the under face of the base plate 85. The nut 92includes a rearwardly projecting bearing frame 99 in which is journaleda horizontal shaft 100 provided at its outer end with a grinding wheel101, and connected at its inner end,

by means of a universal joint 102, with a telescoping or flexible shaft103, which, in turn, is united by means of a universal joint 104:, withthe end of the shaft 22 of the motor 20.

The drive from the motor 20 to the grinding wheel 101 includes the shaft22, .the universal joint 104, the extensible shaft 103, the universaljoint 102, and the shaft 100. The spring 91 maintains the grinding wheel101 in a depressed condition, but it is obvious that if the screw shaft81 be lifted by means of the Wheel 82, the grinding wheel 101 may beadjusted vertically. Further, it is possible to swing the screw shaft 81in the direction of the arrows in Fig. 2, the nut 92 and its frame 99tilting, the trunnions 93 rocking in the openings 98 of the slidebearings 94, and the slide bearings 94: reciprocating in the guides 97when the grinding Wheel is raised and lowered as aforesaid. Further, itis possible to loosen the clamp screws 89 and to swing the base plate 85and parts carried thereby on the pivot 87, and to secure the base platein adjusted positions by tightening down the clamp screws. In this way,the grinding wheel 101 may be adjusted laterally. The telescoping shaft103 permits the foregoing adjustments in the position of the grindingwheel 101, without destroying the operative construction between thegrinding wheel and the motor 20. It will be observed that owing to themany adjustments which may be made in the position of the grinding wheel101, practically all kinds of work may be shaped properly by thegrinding wheel. The drive from the motor 20 to the axle 15, to secure areciprocating movement of the truck 2 on the track 1, comprises theshaft 22, the worm 24-, the worm wheel 25, the shaft 26, the worm 28,the worm wheel 29, the shaft 30, the beveled pinions 33, the shaft 3 1,the beveled pinion 36, and one or the other of the beveled pinions 37and 38 which are connected through the instrumentality of the sleeve 39and the spline 10 with the axle 15,. to rotate therewith, and it will beseen clearly that if an appropriate mechanism is provided for bringingthe beveled pinions 37 and 38 selectively into operative relation to thebeveled pinion 30, a reversal in the direction. of the movement of thetruck 2 along the track 1 will be attained.

Under normal working conditions, that is, while the truck 2 isintermediate the limits of travel on the track 1, the friction collar 08on the axle 15, and the projections 69 on the collar. are spaced fromthe free end of the lever 72 and from the free end of the lever 71.Assuming that the axle 15 is being driven by the pinions 36 and 37, asshown in Fig. 1, the thread 6-1 on the axle 15 advances the traveler 63,and the eye 67 on the rod 65, coacting with the lever 71, tilts thelever 71 and the lever 72, in fixed angular relation to each other, onthe pivotal connections 75, in a horizontal plane, until the outer endof the lever 71 lies in the path of the projection 69 on the collar 68.Since the collar 68 is frictionaliy held to the axle 15, the collar 68will rotate, for a time, along with the axle 15, until the finger 69,pressing on the end of the lever 71, tilts the lever 71 and the lever 73on the fulcrum 74:, the lever 73 moving upwardly, in a verticaldirection, and the extension 79 of the lever 73, being engaged beneaththe collar 80 on the screw shaft 81, serving to elevate the screw shaft81 and the grinding wheel 101, the slide bearings 94: moving upwardly inthe guides 97. in this Way, a lifting of the grinding wheel 101 isbrought about, at the time that the direction of travel of the truck onthe track 1 is reversed. After the lever 73 has engaged the stop 7 6,when the lever 73 is tilted vertically as aforesaid, the verticaltilting movement of the lever 7 3 and consequently that of the lever 71is positively arrested, and the axle 15 then rotates in the collar 68,the latter being frictionally held to the axle, as aforesaid, theprojection 59 remaining in engagement with the free end of the lever 71.

hen the traveler G3 is advanced by the threaded portion 6% of the axle15, as above described, the rod 60 advances the cross bar 55, and thecross bar advances the angular arm 50, the collar 51 of the armcompressing the spring 53 against the corresponding collar 14C or theframe 41. The projection on the collar 51 of the arm 50 engages thefinger 18 of the dog 4-0 and tilts the dog on its pivot 19, therebydisengaging the dog from the projection i3 on the frame 4:1. The frame41 now moves to the left (Fig. 1) under the action of the spring 53, thepinion 37 being disengaged from the pinion 36, and the pinion 38 iscoupled up with the pinion 30, thus securing a reversal in the directionof the rotation of the axle 1 3, and it is at the time of this reversal,that the grinding wheel 101 is elevated as aforesaid, the elevation ofthe grinding wheel, at the time of reversal, preventing a gouging orother injury to the work.

When the frame 41 moves to the left as above d1" bed under the action ofthe spring 53, the projection 12 on the frame enwith the dog Since thedirection of rotation of the axle 15 has been reversed, because thebeveled pinion 36 has been engaged with the beveled pinion 38, thetraveler 63 will move to the right (Fig. 1) along the screw 6%. The eye67 on the rod tilts the lever 71 out of engagement with the finger 69 ofthe collar 68, the latter rotating then withthe axle 15, and the lever73 lar 6S ultimately engages with the tree end of the lever 72, and theoperation above described is reversed at the opposite end of the strokeor travel of the truck, the spring 59 is compressed, the projection 58on the collar 57 coacting with the finger 47 of the dog 45 disengagingthe dog l5 from the projection 42 on the frame a1, and the frame 42,moving to the right (Fig. 1) lies in the position oi" Fig. 1, the pinion37 then being coupled up with the pinion 36.

The distance which the truck 2 travels along the track 1 at each strokemay be varied bv adjusting the angle between the levers 71 ahd 72, thisresult being brought about by shifting the nuts 78 on the bolt 77,further adjustments being made by shiftlng such parts as the nuts 61 and62, and the nuts 5%, in order to position the traveler 63, the cross bar55 and the angular arm 50 properly wlth respect to each other.

Having thus described the invention, what is claimed is 1. In a deviceof the class described, a truck; a grinding member; means for mountingthe grinding member on the truck for movement into and out of relationto the work; means for driving the truck; a reversing device connectedwith the drivlng means; and mechanism opcratively connected with thereversing device and with the grinding member for moving the grindingmember out of operative relation to thework when the reversingdevicechanges the direction of travel of the truck.

2. In a device of the class described, a truck; a grinding member; meansfor mounting the grinding member on the truck for movement into and outof ope 'ative rclat-ion to the work; a lever fulcrumed on the truck andcoacting with the grinding member to move the game out of operativerelation to the work; means for driving the truck, said means includinga shaft; a reversing device connected with the driving means; a frictionmember on the shaft and coacting with the lever to move the grmdmgmember out of operative relation to the work; and mechanism operativelyconnected with the reversin device and with thelever to move the leverinto the path of the friction member when the reversing device changesthe direction of travel or the truck.

3. In a device of the class described, a truck; a grinding member; meansfor mounting the grinding member on the truck for movement into and outof operative relation to the work; a lever fulcrumed on the truck forswinging movement in one plane and cooperating with the grinding member;arms pivoted to the lever for swinging movement in a different plane;means for adjustably connecting the arms to varythe angle therebetween;a driving means for the truck and comprising parts wherewith the armscoact respectively; a reversing device connected with the driving meansand a connection between the reversing evice and one arm for moving thearms respectively into the path of said parts when the reversing devicechanges the direction-of travel of the truck.

a. In a device of the class described, a truck; a grinding member; meansfor mounting the grinding member on the truck substantially verticalaxis; means'for driving the truck; a reversing device connected with thedriving means; and mechanism op eratively connected with the reversingdevice and with thegrinding member forraising and lowering the grindingmember when the reversing device changes the direction of travel of thetruck.

6. In a device of the class described, a, truck; agrinding member; meansfor mounting the grinding member on the truck for raising and lowering,for adjustment about a substantially vertical axis, and for swingingmovement in a substantially vertical plane; means for driving the truck;a reversing device connected with the driving means; and mechanismoperatively con nected with the reversing device and with the grindingmember for raising and lowering the grinding member when the reversingdevilce changes the direction of travel of the true z.

7. In a device of the class described, a

a suhstantiaily vertical plane; ashaft jour- In testimony that I claimthe foregoing naled in the nut; a grinding member carried as my own, Ihave hereto aflixed my signa- 1 V by the shaft; means on the truck forrotatture in the presence of two Witnesses.

ing the shaft; a screw threaded into the nut Send mounted to swing withrespect to the EDWARD TABOR' truck; and mechanism for limiting thelongi- Witnesses: tudinsl movement of the crew With respect STANLEY WV.MQRELL, to the truck. 7 W. S. B. HOPKINS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

